1.T5577 Chip
2.125khz.
3.rewritable chip.
4.blank white card,printable by sublimation printer,but can't support inkjet printer.
5.credit card size.
6.This chip comes without pre-programed,because different client need to write it in different format,if you want the cards already pre-programmed,please contact with us.if you can send us technical data then we can try to check your chip style.Thanks.